Commo



frein srnrns PATENT ENOCH BURT, .OF MANCHESTER, CONNECTICUT.

COMMON QRANK-PQWEB, L90M.

.out by; likewise twilled check with wool 'filling for nienswear .beat ,up thick, by ,an

improved motion in the lay, I hereby .declare .that the follo-wingis a full and 4exact description of iny -said improvement.

A A in the `acconipanying .drawing represents in the ldiffer-ent iigures parts of the frame of .the common power loom. Br, Fig. l, is a .curvilinear v`earn which revolves upon a pivot projecting from the standard a, a attached to the traine of the loom. This .cain .consists of a aft plate, B, having a rirnf rising from it., which rim may be about oneourth O an inch thiol; and rise lthreefourths of an inch; C is a lever having its u-lcru-rn Eat E and which lever is operated on by the cam B having on it two small kfriction rollers c, c, which embrace its rim .and which is consequently obedient to the various .curvatures of this rim which ,are so fornied' as .to act by easy ascents and descente. F isa rod .through :a slot in the lower end f of which the lever .C enters at a point nearly .ppposite to the center of motion ,of .the lay D. The upper end .of this nod is at# tached .t-o the movable shuttle :box S.; it:

passes through ,guides ci., d, attached tothe sword of the lay. Tfhe shuttle bogX must contain as many divisions, one .above the` l other, as .there are 4shuttles to be used, and -which are brought to their places by .the curvilinear .cam B which .of coiurse is pre Fig. 2 represents .the arrangement, of :the moving parts as seen on ,the inner side of Y the fran-1e A', A', Fig. l, that is, supposing the frame to be turned around; these parts therefore are in -a direction, the reverse from what they would appear in Fig. l were they not hidden .by the frame, and other portions of the machinery. The ratchet wheel, m, is firmly .attached to the hack of the curvilinear cam, and it nlnet have as many teeth as there are asoents land .descente in the car-n. Ib, Figs. l and Y2, is ,the hand .or claw .by which the ratchet Wheel is moved, a tooth fait a time; this claw is hung upon a lever t, vhaving its 'fulcruin at ft2 on .the frame of the loom. To .cause this cla-.w to ,operate on the ratchet wheel. ,at the proper period for raising .or lowering the shuttle box I enrploy an apparatus, consisting of arm or lever, which .turns horizontally upon ia, or -ulc-rnnl with Vone of its ends bearing upon a ligure wheel, while the other, .at proper intervals, .holds up, ,or lets go .the claw .of the ratchet wheel, `according as the Eend, hearing on' the .figure wheel, rests upon lits periphery, or falls into notches thereon. The iig-.ure wheel or wheels, ,are placed upon a vertical sha-ft which is :made` to .revolve intermittingly, by an irregular `endless screw, upon the .shaft .of .the main cani wheel fof .-theloorn. lo, Z0, is the vertical shaft, which ,carries the lligure wheels, or ydouble figure wheel p, 1p. This shaft has a vertical play equal to Ethe .distance l29;, p, .on the figure wheel, to allow the .end .of .the horizontal arm ior lever to bear upon the periphery, .or to fall into fthe notches, of the one, or the other of these' two wheels, .dependent upon .the required action of the loom.

In F ig. .6 .the horizontal ,erna or lever and .one side ofthe figure wheel :are shown, the under side .of .the girth A2 being turned toward .the eye; p', :is .the figure Wheel and -n ,the horizontal anni workin-g on its fulcrum o., attached to the girth; itrnay .be .borne np ,against the pattern wheel, by a spring or jV otherwise; the .end n lof the :arin extends across the under side of the gir-th A2 to the .claw It, which it ,holds up .during the time, that .the opposite end bears on the periphery .of ya, but suiers it to descend, to another .and the opposite end, n, is seen in Figgl,

bearing against a part of the claw 7L, where it lifts it, or allows it to fall upon the ratchet Wheel as required.

In Fig. 2 W, is a section of the irregular endless screw, upon the shaft of the main cam wheel 8, Fig. l; a top view of this is given in Fig. 7, showing the manner" of forming the irregular screwyfw, upon the cam shaft fw, of the loom, upon which is iixed the main cam wheel 8; L, is a toothed wheel on the shaft 7c, into which the screw w, takes-causing it to revolve intermittingly, as above stated, turning it around, the distance of one tooth, by the oblique part of its thread, in eachrevolution of the cam wheel. When the curvilinear cam is moved by' this screw, which in some patterns will be most eligible, (as before intimated,) instead of a ratchet on the curvilinear cam, and that revolving on a pivot, it is made fast on a shaft, on the upper end of which is a wheel similar to L and like that meshing into the screw, but on the opposite side of it from L, in this case the curvilinear cam will of course lie horizontally. The wheel on the upper end of its shaft will, in some patterns, remain constantly in the screw, to be moved by it at every revolution, and in other pat-V terns, it is disengaged from it, except when required to move when it again enters the screw, by the action of the ligure wheel p, p, and the horizontal arm n changed a little in its position for this purpose. Y The shaft la, I have said, has a vertical play, and this is intended to bring, alternately, the respective sections of the gure wheel p p, op posite to the arm n, which by'riding upon one or other of the figure wheels, and by falling into the indentations thereon, forms the required border, and by its transitions forms the divisions between the handkerchiefs, and then forms the next border, and then on moving back again, forms the body of the handkerchief in a way which will be readily understood by those who are well skilled in the construction and operation of figure looms. The longitudinal motion is given tothe shaft 7c, by means of the wheel a', and its appendages. This wheelhas three more teeth than is equal to the number of times that the figure of the body of the handkerchief is repeated. U is a sliding lever which raises the shaft 7o, by the action of the projections or risers y, y, upon a hub, or plain wheel making a part of fr; the projections or risers y y, are one tooth apart and their operation on the lever U, will be perceived by inspecting the drawing. The

inner end of U, bears against the lower side ofthe plane wheel R upon the shaft In, which plane wheel has one notch or indenture in it into which the pin t, of the sliding lever U falls Yat every revolution of it, and thus permits the claw V to fall upon the ratchet wheel for the purpose of moving it the distance of one tooth. The wheel is upon an independent axis, its sole office being the regulating the vertical motion of the shaft la, and its appendages. The claw V, is suspended from the same lever, 7b', which carries the clawi, before described, and this lever is raised once at each revolution of the main cam wheel 8, by a pin projecting inwards from that wheel having on it a friction roller, coming in contact with the under side of the lever, which it lifts to the required height. y

The wheel sa, with its appendages for giving or regulating the vertical motion of the shaft 7e, is entirely omitted except in those looms which are designed for weaving bordered handkerchiefs.

To bring the lay down with an increased velocity, I employ two circular toothed wheels 2, 2, Fig. l, each hung eccentrically upon its shaft, to the extent of an inch or more; These wheels are equal in size, and are equally eccentric, and are made to operate regularly by having the shorter line of the one geared into the longer line of the other, measuring from the centers of their shafts to their peripheries. The shaft 2, of the wheel 2, it will be seen is the crank shaft which works the lay. The left pulley is on the shaft of the wheel 2, which wheel is in part hidden by a wheel2", which is at tached to wheel 2, and is uponY the same shaft; the shaft however passing through its center; this front wheel meshes into the main cam wheel 8, and gives to it a con tinuous and equable motion. The aforesaid eccentric wheels are employed in those looms only which are designed for heavy fabrics where this motion is required.

Y VTo preventthe occurrence of errors in the ligure which'would be occasioned by the running of the shuttle without a thread, I have invented what I denominate a thread protection, by which the loom is made to stop of itself whenever a bobbin is spent, or a bobbin thread breaks. Of this thread protection, I employ two varieties, the first of which is somewhat analogous to, but is an improvement upon the plan invented by me some years since, and attached to a loom, jointly patented by me and Oliver D. and Amos H. Boyd; denominated Burt and Boyds power plaid loom. My improvement upon this plan consists in attaching to the breast-beam, opposite to the aperture in the lay, a hollow rectangular case', within which works a horizontal slider, which slider the bobbin thread forces back; upon each side of this slider and within side of the hollow case, are two pieces of metal, in the form of an L, extending toward the lay, and a little beyond the hollow case, held and regulated by a spring within the case. As the tay comes up the ends of these Ls strike upon the bobbin thread, on each side of the aperture 2in the lay, and hold -the thread ffast,so that a'by the beating ufp ofthe cloth vthe fhorizontal slider :is fd'riven back by the thread unlocking the springfcatch Athat lholdsup an arm, which `i-fnotthus permitted to descend would stop the loom` and cast off the 'belt This arm is hung upon the front part of the loom, and extends forward, between the sword and the loom frame, so far as to be even with the back side of the sword, when the lay has moved back about two inches; its end is here bent at right angles either toward the sword of the lay, or upward toward the race beam; a steel plate is made fast, either to t-he back of the sword projecting a little beyond its outer edge, or upon the back side of the race beam, extending downward below its under side, according as the upper end of the before named arm is bent inward toward the sword, or upward to-ward the race beam, and at such. a `point as to meet the rectangular end of the arm, as the lay goes back excepting the arm be unlocked, and its end permitted to descend. This arm is raised and caused to lock, by the lay in its motion forward. To protect the ends of the Ls, and the horizontal slider, a bonnet or cap is put over them, attached to the Ls and consequently moving back and forward with them. In Fig. 3 is shown a view of the principal parts of this first variety of thread protection. H is the end of the breast beam which is supposed to be cut off at II, to show the inside of the frame of the loom A, under it, and the respective parts attached thereto. I is the rectangular hollow case, upon the breast beam, having within it, the horizontal slider m, projecting from its end. As the Ls and spring are covered by the bonnet or cap and hidden in part by the hollow case, they are shown by the dotted lines, with their references on the drawing. The lever 2 is connected with the slider, and unlocks the catch 3, from the pin 4, permitting the end of the arm 5 which is raised up by every forward bent of the lay, by means of a lifting pin 6, to fall below the steel plate which is either (as before named) on the sword of the lay, or on the race beam.

My second variety of thread protection is as I believe altogether new in principle, and consists of a simple apparatus within the shuttle itself so arranged as to prevent the shuttle from boxing unless the bobbin thread be entire. Within the shuttle and hung iii its side there is a compound lever, the first lever being hung near to that end of the cavity of the shuttle from which the thread is drawn out. The thread passes first through an eye in the end of this lever, and thence out through the bush or thimble into the web. The other lever is hung in a slot or mortise made through the side of the shuttle, extending from the heel of the first lever to the center of the shuttle. One end of this second -le-ver is placed under -the 5heel of the first or hun'gltofitbya pin, 4ithe other end is made in the `form of an L and-projects about an eighth of an inch from the `outside of the shuttle, being kept in that lposition by the pressure of a delicate vspring ivhenthe thread 0is, passingo'if from the bobbin by the motion of vthe shuttle through the neck. The end f of shuttle reaches it, and by which` it is thus the loom necessarily stops and casts off its belt by the action of the ordinary or common shuttle protection. This second variety of thread protection which is contained within the shuttle itself, is shown in Fig. 5, where S is the shuttle, and c, c', the compound lever, that marked c, having the hole in its end for the thread to pass through, and by which it will be drawn toward the thimble g, causing its opposite end to act upon the lever c, and consequently to extract the projecting end c, within the surface of the shuttle. B is the shuttle box, G, the shuttle guard, L the sliding bolt which passes over the end of the guard G, when struck by the projecting end of the lever c. The shuttle is in this figure represented with the levers in the position they would assume if entering the box with a broken thread.

I have herein described many things common to power plaidv looms and which of course, I do not mean to claim as of my invention; but I do mean to claim the revolving curvilinear cam as combined, and cooperating with the horizontal lever, and the perpendicular rod to move the shuttle box in the manner described. I also claim the` combination of the irregular endless screw with the vertical shaft and double figure wheel thereon, and the arrangement by which the said vertical shaft is made to move provement vthereon the combination of the Vprevented from entering further into the shuttle box. When the shuttle is thus situated,

rectangular hollo7 case, on the breast beam,

the bobbin being spent, this eiect being pro- With the Ls,within it for holding the thread duced through the compound lever, and the 10 together with the application of the stop lever immediately to the layer.V

' In the second variety of the thread protectionI claim as my invention Y -Y The preventing of the shuttle from boxing by the breaking of the bobbin thread, or by coperatie-n of the other parts, substantially in the manner described.

Y ENOGH BURT.

Witnesses:

GrEo. W. CHENEY, MARY CHENEY. 

